Improvement in magnesium-lamps



R. H. THU-HSTON.`

Magnesium Lamp.. y Patented May 1 1866;

NOI

UNITED STATES PATENT OFFICEO4 n ROBERT H. THURSTON, OF PROVIDENCE, RHODEISLAND.

IMPROVEMENT IN* MAGNESIUM-LAMPS.

Specification forming part of Letters Patent No. 54,442, dated May l,1866.

To all whom tt may concern:

Be it known that I, ROBERT H. THURS- TON, ot' the city and county ofProvidence, in the State of Rhode Island, have invented a new and usefulImprovement in Lamps for Burning Magnesium and I do hereby declare thatthe following specication, taken'in connection with the drawings makinga part of the same, is a full, clear, and exact description thereof.

Figure l is a side elevation. Fig. -2 is a front elevation. Figs.'3 and4. are details of modifications to be referred to hereinafter.

The accompanying drawings represent an appara-tus for burning magnesiumin many respects similar to the one which Ihave already described in aformer application for Letters Patent. I propose, however, in this todispense altogether with guides for the magnesium wire or ribbon, but toburn the sanne as it issues from the feeding-rollers, therebyeconomizing the construction of the apparatus, and also to make use ot`stationary scrapers for clearing oi' the ashes as they are formed.

B, Fig. 2, is one of a pair ot' feeding-rollers, which is made torevolve and feed forward the ribbon or wire of magnesium, El, by meansof a train of wheels, as shown in Fig.

v l, for which the weight W is the prime motor.

In Fig. 2 l have shown the pressure-roller D as geared to the rol-ler B,so that the two will move simultaneously, and also an arrangement bywhich the space between the two rollers can be regulated to admit metalof different thicknesses; but in Figs. 3 and 4 I have shown only asingle feed-roller, the pressurespring I), bearing upon the strip orwire ot' magnesium, answeringthe purpose of a second geared roller.

The strip or wire ot' magnesium will be, by this arrangement, burnedupon the surface of the feed-roller instead otl at the extremity ot' theguide, and from the nature of the lnaterial it has been found that thiscan be done suceesst'ully.

For the purpose ot' clearing the ashes from the roller l make use ot' ascraper, k, Fig. l, which is stationary', and bears against the t'ace ofthe roller as it revolves. Thus', as an incident ot' the discovery thatthis metal Acan be burned upon the surface of the roller quite as wellas by the use ot' a guide, I am enabled to combine with such roller astationary scraper, which will enable rne to dispense with the apparatusfor rotating the scraper shown in my former application.

What l claim as my invention, and desire to secure by Letters Patent, isv 1. The use of the feed-roller B as a surface on which to burn a stripor wire ot' magnesium, substantially as described.

2. The combination of the stationary scraper, lc, with the roller B,substantially as described, and Jfor the purposes specified;

EOBEET E. TEUEsToN.

Witnesses:

BENJ. F. TEURsToN, J oHN D. THURs'roN.

